Stave



June 14, 1938. A LAWRENCE 7 2,120,838

STAVE iled June '7, 1937 Patented June 14, 1938 UNITED STATES PATENT OFFICE STAVE Rollie A. Lawrence, Elgin, 111.

Application June 7, 1937, Serial No. 146,771

2 Claims.

This invention relates to staves for use particularly in constructing silos but which also may be used in building other structures.

Staves have been constructed heretofore in the shape of slabs having one vertical edge convex and the opposite vertical edge concave and having a rib projecting from the outer surface of the stave at the concave edge. The staves are made of cement in molds with the rib side, or outside, of the stave at the bottom of the mold. Removable members are placed in the mold to shape the side edges. The use of these members has produced offsets at the convex edge of the staves so that when the staves are placed in 15 position with the convex edge of one stave in engagement with the concave edge of the adjacent stave the offsets have prevented full and complete engagement therebetween.

The primary object of this invention is to provide a complete bearing at the juncture of adjacent staves along their side edges.

Another object is to provide space at the juncture of adjacent staves along their side edges to receive plaster or pointing material without affecting the bearing at the juncture.

A further object is to provide a space at the horizontal juncture of the staves to receive pointing material.

A still further object is to provide a rib along one horizontal edge of a stave to engage a corresponding horizontal recess in an adjacent stave for alining the staves and keeping them in alinement.

' A selected embodiment of my invention is illustrated in the accompanying drawing where- Fig. 1 is a perspective view of several staves in position and. forming a part of a silo or similar structure;

Fig. 2 is a horizontal sectional View of a part of the wall of a silo;

Fig. 3 is a sectional view taken on the line 33 of Fig. 2; and

Fig. 4 is a plan view showing the bottom end of a stave.

In the building of a silo or similar structure,

a foundation 5 is provided of the proper size and a plurality of staves 6 and l are placed on end on the foundation in alternate relation. The staves l are of less height than the staves B so that there will not be a continuity of joint between the staves about the silo. All staves above the first row Will be of the same height so that the continuity of the juncture between staves will be broken throughout the height of the silo.

The top row of staves however is made of alternate short and long staves so that the top of the silo will be even. The staves are provided with a convex side edge 8 and a concave side edge 9. side edges is the same so that the concave edge on one stave will receive the convex edge on an adjacent stave in full bearing relation. The side edge 8 is offset at in due to the molding requirements forming shoulders at the juncture of the side edges with the inside and outside walls of the stave. The side edge 9 is correspondingly offset forming a shoulder H and is cut away at I2 adjacent the concave recess 9 to accommodate the offsets II] on an adjacent stave. A vertically extending rib I3 is provided at the concave edge and is arranged to overlap the convex edge on an adjoining stave to reenforce the structure and make a strong overlapping joint between the staves. When the staves are joined as best illustrated in Fig. 2, sufficient space is provided at the joints adjacent the offsets so that pointing material I4 can be inserted and. securely held in position on the outside of the structure and plaster l5 may be inserted in the space on the inside of the structure.

A recess is provided at l6 along the inside top edge of each stave to receive plaster ll sothat the joint between vertically adjacent staves will be sealed.

A rib I8 is provided and is arranged on the top longitudinally thereof and is adapted to interfit with a recess I9 on the bottom of the vertically adjacent stave. This rib provides for positive alinement of the staves and prevents shifting thereof after the structure is completed. Slots 20 are also provided on the outer surface of the rib I3 adjacent the top and bottom thereof to receive the hoops 2|. The hoops lying in the slots 20 cannot slip out of position after the structure is completed due to the interlocking effect of the slots 20 with the hoops.

While I have illustrated and described a preferred form of my invention it is to be understood that this is capable of variation and modification and I therefore do not Wish to be limited to the precise details set forth but desire to avail myself of such changes and alterations as fall within the purview of the following claims:

I claim:

1. A stave for a silo or the like having inside and outside walls, a convex side edge, a concave side edge, and a rib on the outside wall extending beyond the concave edge and being partly cut The radius of the curve forming both' away at the face thereof facing the concave side edge forming a shoulder at the juncture between the rib and said concave edge whereby the convex edge of one stave may be arranged to interfit with the concave edge of another stave with full bearing contact therebetween and with the rib on said other stave overlapping and spaced from the outside wall of said one stave to receive pointing material in said space.

2. A stave for a silo or the like having inside and outside Walls, a convex side edge spaced inwardly of the stave from the inside and outside walls respectively forming shoulders at the jucture between said concave edge and said walls, a concave side edge spaced inwardly 'oi the stave from the inside wall forming a shoulder at the juncture between said concave edge and said inside wall, and a rib on the outside wall extending beyond the concave edge and being partly cut away at the face thereof facing the concave side edge forming a shoulder at the juncture between the rib vand said concave edge whereby the convex edge of one stave may be arranged to interfit with the concave edge of another stave with .full bearing contact therebetween and with the adjacent shoulders of adjacent staves spaced from each other and with the rib on said other stave overlapping and spaced from the outside wall of said one stave to receive pointing material in said spaces.

ROLLIE A. LAWRENCE. 

